MATLAB: Using regionprops to change intensity of blobs

image processingImage Processing Toolboxregionprops

I am having a gray scale image which has certain blobs. The region apart from these blobs has intensity of 0. Using regionprops() I can extract various properties like Area, mean intensity of each blob.

Based on these mean intensity of a blob I want to modify the intensity of that blob. Any ideas on how I can achieve that?

Best Answer

Using regionprops you can also extract the PixelIdxList of the different blobs. You can use that to modify the pixels in the desired region,

S=regionprops(...,'PixelIdxList');
myImage(S(i).PixelIdxList)= new_Intensities;

Related Solutions

MATLAB: Finding solid circles using imfind circles

Make a mask from the circle, then

hasBlackInside = min(grayImage(mask)) == 0;

hasBlackInside will be true if there is at least one black pixel inside the mask.

MATLAB: How to crop bigger size of blob in binary image and count its pixel .

Not sure what you mean. You can use imcrop() if you want. You can also find the bounding boxes if you want:

props = regionprops(binaryImage, 'BoundingBox');

To crop out each one individually, do this

for k = 1 : length(props)
    thisBB = props(k).BoundingBox;
    subImage = imcrop(binaryImage, thisBB);
    figure;
    imshow(subImage);
end

This is done in my Image Processing Tutorial

Best Answer

Related Solutions

MATLAB: Finding solid circles using imfind circles

MATLAB: How to crop bigger size of blob in binary image and count its pixel .

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